AQA GCSE - Unit 3 (P3,B3,C3) New specification papers.

What are the tests for halides??????

Reply 1141

Original post by Captain Anonymous

double circultaion is basically means the heart pumps blood in 2 diffferent ways and for 2 different areas. From the lungs to the heart and from the heart to the body

Correct so far, but didn't answer why we need it.

Reply 1142

Original post by Captain Anonymous

What are the tests for halides??????

For halide ions, add dilute nitric acid and then silver nitrate solution.
Chlorine will give a white ppt, bromine a cream one and iodine a yellow one.

Reply 1143

Don't mean to keep blabbing on about the ISA's but this is my last question, i promise.
How much can you write on the notes page. For example, can i write my full method and then copy it out on the paper directly?

Reply 1144

Original post by Kill3er

Don't mean to keep blabbing on about the ISA's but this is my last question, i promise.
How much can you write on the notes page. For example, can i write my full method and then copy it out on the paper directly?

it should be note form - but most people write the whole thing out :colondollar:

Reply 1145

Original post by Captain Anonymous

it should be note form - but most people write the whole thing out :colondollar:

Yeah, that's what i was thinking.
Our teachers seem to allow it.

Thanks.

Reply 1146

pleasure, same my teacher don't really care :L

Reply 1147

Original post by Captain Anonymous

pleasure, same my teacher don't really care :L

But what about when they get moderated. If they make the couple that get sent off redo their notes page i guess it will be okay. But if not, are we done for?

Reply 1148

Original post by Kill3er

But what about when they get moderated. If they make the couple that get sent off redo their notes page i guess it will be okay. But if not, are we done for?

I dunno, but I made one of my ISA sources up.

Reply 1149

Original post by NightStrider

I dunno, but I made one of my ISA sources up.

Haven't made any of mine up, but some of the websites i've used are no longer working :L Guess there's nothing i can do now.

Reply 1150

MsRaindrop

Hey guys,

I was wondering if anyone here could perhaps explain how the split ring commutator works (P3-Motor effect)---> I don't get how it works generally/ reverses the current? :confused:

Also why do we add acids to the halide and sulphate ion tests...(C3)

Reply 1151

Original post by MsRaindrop

Hey guys,

I was wondering if anyone here could perhaps explain how the split ring commutator works (P3-Motor effect)---> I don't get how it works generally/ reverses the current? :confused:

Also why do we add acids to the halide and sulphate ion tests...(C3)

Lets say one side of the wire is currently on the positive side. - it is positive. It spins, and when it moves to the other side note how it goes from being connected to positive to negative. Thus, the current has been reversed.

Reply 1152

Dunno really if there's anything wrong with ISA's it our teachers/ school that will get in trouble not us :smile:

Reply 1153

Captain Obviou$

5

Original post by Captain Anonymous

Dunno really if there's anything wrong with ISA's it our teachers/ school that will get in trouble not us :smile:

Umm..not to bother u or anything but can u help me on my section 2 of my chemistry isa i have it on monday..and i didnt know about it so im doomed

Reply 1154

Midnight1811

3

Original post by Kill3er

Haven't made any of mine up, but some of the websites i've used are no longer working :L Guess there's nothing i can do now.

Don't worry, my websites were 'generic' by that I mean it was simply an adresss (www.123helpme.com), this is all required from the url, and just the AQA Chemistry Book published by Nelson Thornes etc... That will be sufficient for the marks.

Reply 1155

Arshii

Hi guys! i actually found these podcasts for all the sciences.. - following the exact spec..they are really helpful tbh - just refresh of all the stuff.

Unfortunately, i can't attach them here as the files are quite big but, if you guys want i am able to email them to you. :smile:

Reply 1156

username1160544

12

Original post by Arshii

Hi guys! i actually found these podcasts for all the sciences.. - following the exact spec..they are really helpful tbh - just refresh of all the stuff.

Unfortunately, i can't attach them here as the files are quite big but, if you guys want i am able to email them to you. :smile:

That would be great!

To solve the problem of not being able to attach the files, you could upload them to a public Dropbox folder and then just post the link.

Reply 1157

Arshii

Original post by Joe7

That would be great!

To solve the problem of not being able to attach the files, you could upload them to a public Dropbox folder and then just post the link.

Okay!
Have made an account on dropbox where I have uploaded the files..
Go on: www.dropbox.com

Username: [email protected]
Password: password

You should find the files there and able to download them.
Hope you find them useful :smile:

Reply 1158